not sure i've seen this before. this is a 6L with a rebuilt LSA blower on it.
when it goes PE during WOT, until 4000 rpm, the injector banks are doing different ms open times. as much as 1.6ms apart. then at 4000, they're the same. trims show nothing. this isn't the maf only switch at 4000 rpm because i've set that to 2000 rpm.
1.6ms on a 65 pound injector is a decent difference.
any ideas?